raspberry pi display 7" official info

https://forums.pimoroni.com/t/official-7-raspberry-pi-touch-screen-faq/959

Note: An update has been pushed to Raspbian to flip the screen ( rotate it by 180 degrees ) for a better desktop viewing angle. This makes it upside-down in our stand and the official Pi stand, so you’ll need to change a setting to flip it back.
To do this, open /boot/config.txt in your favourite editor and add the line:

lcd_rotate=2

This will rotate both the LCD and the touch coordinates back to the right rotation for our display stand.
Don’t use the documented display_rotate, it performs a performance expensive rotation of the screen and does not rotate the touch input.