You can assume 85 percentile score as qualifying percentile for general.Although this is expected percentile.I can assure that cuttoff percentile will be around this figure

You can ask if you have any other queries.

GOOD LUCK!

We can't say the qualifying percentile in advance. But we can predict the rank for the percentile you got by the formula:

Rank =( total no of students -( percentile*0.01*total no of students))

use this formula to find your rank. Hope this helps.