This is a little off topic, but in today's society what is considered a good salary for a man that has a wife and kids? Basically the man is the breadwinner in this situation.
I was thinking six figures, but then I saw the percentage of people making six figures isn't very high, so I don't know.
Thoughts?

I think a man who supports a non-working wife and 2 or 3 kids needs an income of at least $100,000 to live a comfortable life. As you say, this is a small percentage of Americans. In most families, both husband and wife have to work, and even then the median household income is about $52,000. Life ain't easy.
I grew up in the 1950's and 1960's when most wives did not work (outside the home), and I was always the principal breadwinner for my wife and children. I was able to provide a nice life for my family and send my children to college. Not everybody is so lucky.