80 percentile has usually meant about 55–70 marks and a Common Rank of about 2.6–2.8 lakh.
These are estimates based on recent sessions and about 13–14 lakh candidates; your shift and the total number of candidates change them. This is usually below the General qualifying cutoff for JEE Advanced, but above the cutoffs for OBC-NCL (79.43 in 2025), SC and ST.