yes i think you can improve your score from a 560 to a 760.
A 560 test taker probably or didn´t study enough for the gmat, or studied wrongly, or
he didnt have enough motivation. The reasons therefore can be different or a combination of
Dont understand me wrong, an improve of 200 points is not easy at all, but i think it is possible,
especially if you have a good learning curve.
One factor which influences your learning curve is certainly your motivation, so if you keep to be motivated
and study in the right way, then you could do really good
All the best