With 63% in 12th and 84 percentile in JEE Mains, and belonging to the BC-B category, you have a fair chance to get admission in some good government or private engineering colleges. Your JEE percentile is good, so you can try NITs with lower cutoffs or good state-level colleges in your category. Also, private colleges like VIT, SRM, or other reputed institutes are good options. Participate in counseling carefully and choose branches and colleges based on your rank and category for better chances.