When you open Xstreet, on the top left hand side you should see "My Marketplace", inside this little box you will see your balance. Now under your balance you should see 'Withdraw', hit that button. A little box will pop up asking how much you want to withdraw, enter the amount you want then hit the 'Withdraw Funds' button. There ya go, should have money in-world after that!
Happy tipping! =)