Does your school use Naviance? If so, are most kids from your school with similar stats getting in?
I don’t think safeties have to have an overall acceptance rate of 60-70% or more. My kids’ didn’t. It depends on one’s own profile and how their school does placing students.
If you look at the university’s common data set linked below, you’ll see your stats are right about the 75% range. However, even a safety school isn’t a guarantee unless it has an auto admit policy. That’s why you should apply to 2-3 safeties at least IMO.