Honestly, 90 in NATA is an average score.

Also, your admission to any Architecture college in India depends on your NATA score and your 12th Board marks.

So your NATA score out of 200 will be converted into marks out of 100 and your 12th marks will be added to it which will give you your Final Merit score.

Anything above 130 will get you into a very good college (Private) and a score above 150 is required if you want admission in a government college. Anything between 100 and 130 will get you into a decent college and if your score is below 100 then it might be a little difficult to get into a college of your choice.

Now you have two options, if you are confident enough that you will get a score above 90% in Boards then its okay to go ahead with this NATA score or else work hard and give NATA again as you can attempt NATA five times and your highest score is considered out of all the attempts that you make.