There's no "score" page to click on for explanations in my office page, unless I'm doing something wrong. (or maybe it won't show up until construction is complete?)
I do see that I have a score of 20, the building is still under construction right now though.
You also get points when you get a certificate or a medal when you participate in contests. look in the paper and you will see how many points you get.
Also people need special products of a certain quality when they perform the tasks in those special buildings that PriceCoopers link refers to.
When you produce those products you can make a good profit.
If you want to know what the products are send me an IGM and I will send you a list.