Aim higher!
Sry couldn't resist
Why is it that every 5-6 days someone has to post that their M&P is shooting low? Does anyone now how to use a search engine anymore! Seriously how many times in the last 3 months have you seen this exact question! 5,10 !!! This is a first post for this person but if he had even read back through the thread titles for the first few pages he would have found his answer!
If it is like most modern semiautos with 3-dot sights, aligning the dots and using a 6 o'clock sight picture will put your shots low. The dots need to be aligned and the front dot placed where you want the bullet to go -- essentially, blocking your view of the POI.
I would suggest reading and studying this. Read and study this several times and off and on for as long as you shoot. This is the basics of good marksmanship but all marksmanship start out with the basics. I have got this saved in my favorites. Don
Encyclopedia of Bullseye Pistol