What will happen is the disc will start by slipping since the applied force is greater than that required to make it roll. The kinetic friction on the bottom of the disc will make it start to rotate. Then, over time, the rotational speed will increase until it gets to the point where it is rolling without slipping. (Of course the CM will be accelerating all the while.)
I should be able to prove this to you using Physics given some time (I can't do it "off the cuff" as it were) but the logical argument above should be easy enough to see. If you need a more Mathematical answer I ought to be able to provide it. Let me know.
-Dan