"So if a low-winger has its wing raised from the tip side does that makes it more stable ?? "

In general, Yes. Incidentally, a high wing aircraft can have it's wings drooped to improve roll stability.

"And what about the stabilizer if its level is higher than the wings"

This is a different issue (not really related to roll stability). The stabilizer can be raised above the level of the wings to get it out of the way of the wing downwash.

"Now I'll go read that link "

I has a lot more information than I care to write about here!