Agree, 75 is a bit warm. I would never advise pitching over 68-70 degrees, and preferably a few degrees cooler than this. Are you sure the fermentation temp, which will be 4-6+ degrees over ambient temp, was 67-68? If so that would mean your house (or fermentation control unit, whatever you use) was set around 62 degrees.
Regardless, let it sit another couple of days and then check the gravity.