Python 3.6.6 but I am using 3.6.8
There are instructions
which make it sound so easy.
Tensorflow is distributed, you just need to install it. If you are using 'clone's then you have to install it there. If you don't have full admin privileges on your machine or are wary of messing with the base distribution, then you will have to clone the default environment first.
it is a pretty beefy install so I would suggest a 'dry run' in conda first
conda install tensorflow -c esri --dry-run
to make sure you don't break anything elsewhere.