My dear aspirant,
If you want to take admission in Government Engineering College that you can't take your admission to there you must have to give some entrance examination that you can do do your engineering through Government College....

Now you can get your admission directly through 12th result in private college by many management quota..
Private Engineering colleges take their students.. through 12 results ( if they scored 40-50%)..here some colleges name..

Anna University

Amity University

National Institute of Technology Rourkela

Vellore Institute of Technology

Institute of Chemical Technology

Indian Institute of Technology Indore

Birla Institute of Technology & Science -Pilani

Indian Institute of Engineering Science And Technology, Shibpur

Indian Institute of Technology Bhubaneswar

Indian Institute of Technology Patna

Jamia Millia Islamia

Indian Institute of Technology Ropar

National Institute of Technology Surathkal

Indian Institute of Technology (Indian School of Mines)

Thank u !!

Hello student,

As you have scored 84% in your 12th board examination you are eligible to get admission in many engineering colleges. Many private colleges have cancelled there entrance examinations and are just taking admissions on the basis of  class 12th marks. However, admission into IITs, NITs and IIITs is still dependent on the jee score. But here they have relaxed the criteria by not considering the strict rule of 75% score in boards. Just the candidate have to be pass in all the subjects.

Hope this helps.