hello aspirant...

your percentile is well  enough for you to qualify for the jee advanced examination among your category.. as per the prediction made for this years cutoff for your category the cutoff is about 78.21. and this is not the official cutoff declared by the nta, which will be declared later. follow this link to get further details about the cutoff criteria of all category for this year and previous years...

https://engineering.careers360.com/articles/jee-main-cutoff

hope this information was useful to you...

all the best for your bright future...