What's the school's SES? It's usually the 85th percentile "locally normed", i.e. the top 15% of scorers in each of 5 SES groups. Varies from year to year but here are some numbers from a few years back-- varied from 228/national 92nd percentile at the lowest FARMS schools to 213/national 70th percentile at the highest FARMS schools. Might be a little higher because there's probably some pandemic-related learning loss reflected in those 2022 numbers, but likely somewhere in the same ballpark.
https://drive.google.com/file/d/1e0Szg2jJ8F1rL2BZSqCV1fb_R1gLwaRl/view?fbclid=IwdGRjcAMtn9BjbGNrAy2fv2V4dG4DYWVtAjExAAEeP3f1o2kksOQ5xlCTnnWOwqPjTO7Fw0mjQaogPJXRaKdx2Sf7vbFeei0-MR8_aem_xURTtiLujAF2OVtKh1AVkA