The way I see it, he's wealthy because he founded a wildly successful technology company by first creating something of value (MS-DOS). Microsoft has since grown to be one of the largest companies in the world, which hundreds of thousands of people voluntarily work for in exchange for a high salary, at least for engineers.

The Saints are a professional American Football team. A lineman is a defensive player on a football team. Being selected as an "All-Pro" means the player was voted as one of the best players in his position in the entire league (and I guess by extension, the world) during that season.

This person was an extreme outlier in the sea of otherwise average students/graduates at this school.

As an able-bodied young man I could never truly understand the depth of his suffering. I'm actually shocked at the emotional response I felt from reading this. Incredibly moving.