Would being at 10.4% count as top 10%?
Probably not as top 10% means anything less than or equal to 10, but since you’re right there at 10%, it wouldn’t really matter. Colleges don’t see much difference in a 9.8% rank and a 10.4% rank.
No but it depends on the high school and college. For some top schools even top 5% doesn’t count.