Problem with monitor scale

Problem with monitor scale

Hello, I’m new to Linux, been using for about a month.
I was messing around with some settings in Manjaro XFCE display manager and I have set a custom scale of X10 Y10. Now whenever I boot I’m stuck on the login screen. Once I put in my password it tries to start but goes back into the login screen… I have tried running xrandr in tty3 and it says: Can’t open display. Now I’m stuck here.
Can anyone help me please?