There are threads on here and next door that have people getting very hot under the collar regarding the use of the words "stall" and "speed" in the same sentence.
Especially among those who like to be upside down a lot.
Having said that "landing configuration" is the determining factor here, which usually involves being straight and level, reduced power, some flaps, flying slower than cruise speeds etc. Trying to stretch the glide without increasing power seems to cause the problems, so is unlikely to result in maintaining 75 knots on a 172.
At 75 knots and decending at 700fpm is never going to stall because the "landing configuration" including airspeed and rate of decent are maintained.
The only way to stall that is to raise the nose, reducing the speed and increasing the angle of attack.
Or have I just stated the bleeding obvious again?