If a person get 70% mark in +2. ...but in physics he achive 68 or more .....can he able to qualify medical exam???

Hello Ashutosh, as per your query i would like to tell you According to the NEET eligibility criteria, The candidate must have passed in the subjects of Physics, Chemistry, Biology/Bio-technology and English individually and must have obtained a minimum of 50% marks taken together in Physics, Chemistry and Biology/ Bio-technology at the qualifying examination.

For candidates belonging to Scheduled Caste/Scheduled Tribes or Other Backward Classes, the marks obtained in Physics, Chemistry and Biology/Bio-technology taken together in qualifying examination must be minimum 40% instead of 50% for General candidates.

So according to above criteria you will eligible for NEET.
And you are also eligible for AllMS and JIPMER.
Hope it helps
Regards
Dr Parmanand Agarwal
MBBS MD
Career consultant.