I'm 5'9 140. My G19 disappears at 4'oclock IWB. Try it.
Edit: With a baggy tee, you can see it print. But you cant tell what it is. Looks like it could be a phone, insulin pump, etc.
I used to carry at the 9-10 (lefty), but when I discovered appendix I never went back. It just suites me better overall. especially for work, considering I'm not supposed to carry at work and it disappears on me there. I've been slowly converting all of my carry holsters for appendix now.
I still carry on the side in the winter some, but only when I'm wearing a coat all day and not at work.