Hello

First of all congratulations for your this score. If y ou scored 91.2 percentile in jee mains then you must have scored somewhere around 78-87, and the rank you would get at this percentile is somewhere around 30000 to 35000 which is a decent rank to get admitted in any of the colleges

For more details you can check this link:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Hope this will help you

Thanks