Hello Sir, 

As your ward is having his board scores below 75 percent it's hard to find good government engineering colleges.
But still with Jee Score it's possible to get some of them.
One thing you can do is to apply for CSAB special round counselling where you might get a vacant seat.
Second, you can check Institutes available as per his score, here:
https://engineering.careers360.com/jee-main-college-predictor
Hope this will help.
Feel free to ask any doubts.