Other than checking for the latest drivers (as Trevor suggested), there really isn't much you can do to improve that score. I have two laptops, one a Win8 Acer with Intel graphics and the other a Win7 Gateway with an ATI dedicated graphics card, and on both of them, the desktop graphics is the lowest score. I've worked on other laptops with both Win7 and Win8 and found that to be true with them also, for the most part. I think it's because of the "Mobile" GPU; they are designed to use a little less power (hence lower speed) than a desktop add-in card. The Gateway I have is probably the best of any I've worked on (because of the dedicated RAM and HD GPU), but it's battery life is terrible.
Another thing to remember is that these numbers are just that- numbers. If your system is running fine, and you aren't seeing any slow-downs or freezing, or BSOD, I wouldn't worry about it. I used to run all kinds of benchmark programs in the past, thinking my systems just didn't match up to similar ones, but gave up on all that since it all it did was frustrate me and make me spend more money :-) If your laptop works for you, then all the numbers in the world mean absolutely nothing.
SC Tom