A school where the student is in the 75th percentile is probably a low match or safety, except “reach for everyone” schools where almost all students are compressed into a small range at the top of the scale for academic credentials.
But what may be relevant here is that if the student is far away from the median student, a large school may be more likely than a small school to have a non-trivial population of outliers like that student, so that academic offerings may be more suitable (e.g. offering honors courses or other more challenging options to outliers at the top end of the distribution).