Since there isn't too much that a Local Store can help with, As in Damage unless you have the top tear Insurance which might cover the Damage I'd say your best bet is to contact Motorola Service I provided the Link to go from there..
Screen breakage usually comes from when the screen hit's at it's corner.! can you estimate how far the Drop was..
I am sorry about your situation, my samsung has been doing well with its little screen and perfect resolution and i love it when my phone has photo editing options with several cute frames and little emo (some animated) emo to add into messages and photos.
I can understand how that could of Happen as I've put mine there as Well.! in my shirt pocket, The phones Length kind of makes it Vulnerable for this to happen.. I bought a GPS case a case Logic.. brand to put mine in Hopefully it will keep it Safe..
Unfortunately, this type of damage would not fall under the manufacturers warranty. I know in the local malls around me, there are usually kiosks which advertise replacing cracked screens on cell phones. You may want to try something like that. I have never tried one of them, though. Good luck.
Same thing happened to me about 2 wks after getting this maxx. Motorola repair does charge a fee of 150- but worth it. My only concern is that these screens don't appear to be gorilla glass they shatter to the point of not being able to touch the screens....older razor maxx much stronger.