Congratulations for scoring 84% in your 12th standard. Here is the list of the top B.tech colleges:

• BITS, Pilani
• ICT, Mumbai
• VIT, Vellore
• Thapar Institute of Engineering and Technology [TIET]
• Indian institute of space science and technology.
• ITER, Bhubneshwar.
• BIT, Mesra
• Amity University
• SRM University
• MPSTME, Mumbai
• LPU, Jalandhar

Hope this answer will help you

Best Wishes !