Hey Sai,

There's a special entry for Navy after 12th known as Navy-tech entry. The eligibility criteria counts your boards percentage, that's it. The cut offs are released and are generally around 80s. Since you've scored great in boards, you'll get a call letter for the SSB Interview. Until and unless you don't clear the interview, you won't get into the academy. That's more important. Start preparing, good luck!