If you look at the most recent UNC-CH Common Data Set, here, https://oira.unc.edu/files/2018/06/CDS_2017-2018_20180605.pdf , under Part C7 it states that standardized test scores, application essay(s), letter(s) of recommendation, and the rigor of your high school record are “very important” academic factors considered for freshman admission, whereas GPA and class rank are “important” academic factors considered for freshman admission. Extracurricular activities, talent, and character/personal qualities are considered as “very important” non-academic factors. Further, Part C9 of the Common Data Set for UNC-CH gives the median 50% for both SAT and ACT scores, as well as the percentage of the entering first-year class falling within certain ranges of SAT and ACT scores; Part C11 gives the percentage of entering first-year students falling within a range of unweighted GPA on a 4.0 scale, and Part C12 gives the average high school GPA of first-year applicants.
Notwithstanding the published admissions factors and their weighting, however, your GPA and class rank may not be as much of a hindrance to your admissions chances as being from Wake County. As you may know, the UNC System is making an effort to increase enrollment of North Carolina students from under-represented and/or economically distressed counties, as set forth in a document styled “Higher Expectations”: The Strategic Plan for the University of North Carolina (2017-2022). At Page 9 in that document, it states as follows:
“2. Rural: By fall 2021, increase enrollment of students from Tier 1 and Tier 2 counties by 11% over fall 2016 levels (an average of 2% per year) to reduce the existing participation gap by at least half.”
(Counties are placed in “tiers” as follows: “The N.C. Department of Commerce annually ranks the state’s 100 counties based on economic well-being and assigns each a Tier designation. The 40 most distressed counties are designated as Tier 1, the next 40 as Tier 2 and the 20 least distressed as Tier 3. A county automatically qualifies as Tier 1 if it has a population less than 12,000 people or if it has a population less than 50,000 and a poverty rate of 19 percent or greater. A county automatically qualifies as Tier 2 if it has a population less than 50,000.”)
https://www.northcarolina.edu/sites/default/files/unc_strategic_plan.pdf
The State of North Carolina has published the tier designations for its counties, here: https://www.nccommerce.com/research-publications/incentive-reports/county-tier-designations
I would talk to your high school guidance counselor to discuss how former students from your school have fared recently in admissions to UNC-CH; and also how the implementation of the UNC System policy may affect your specific application. Additionally, if your high school has Naviance or any similar program that gives information about how students at your high school have done in applying to UNC-CH, then looking at that data might give you some insights as well.