My son's chances?

My son applied regular decision. 1300 SAT, weighted GPA 3.8. He is in the IB diploma program (full IB, not just some courses) but struggling a bit with his grades (had a C and a D at the end of his junior year but now all A’s and B’s, mostly B’s). Some extracurriculars (DECA) but no school sports, good amount of volunteering. His father is also a JMU grad.
Thanks.