Hello,

For jee advanced eligibility criteria main thing is

• You have to get minimum 75% marks in 12th class examination.
• You have to qualify the JEE Mains examination.
• Your rank in between 25 lakh then you can appear for JEE advanced examination.

So you got 85 percentile in JEE Mains examination I guess although you didn't mention the percentage is JEE main or 12th class. If it's JEE mains score then your rank in between 160000. So you can appear for JEE advanced examination.

If you getting good marks in JEE advanced then you get IITs also.

All the best.