"A good name is better than anything you can achieve in this life time."

 What i think coach K is saying that the best way for anyone to see you is to have a good name. This good name will continue on even after you have left this world. That good name will represent who you were. If you had a bad name everyone's opinion will be based on what history your name has. If you don't have that good name no one will remember you. Since coach K has a good name people will remember him. This good name will keep you "alive" in history. A good name can also help with jobs and colleges to. A good name is the best thing you can achieve.