Installing vmtools either on a fresh build or after the monthly OS updates is one of the few remaining reasons for connecting to the command line.
Would be nice to have a button in the gui.
Generically it only needs to run the following (assuming the installer has been mounted in vcenter)
mount /dev/cdrom /mnt/cdrom/
tar zxvf /mnt/cdrom/VMwareTools-9.6.2-1688356.tar.gz
or if just reinstalling after an OS update:
Running as root obviously!