Hi Anne-Marie,
You can certainly do the first part using Patterns, which is available in the Object > Field tab. When setting a pattern you can wrap additional text in single quotes. Because of that we would have to use a slightly different single quote for the feet value, where the inches is a double quotes wrapped in single quotes.
text{X'`'XX'"'}
Similar approach for the weight:
text{XXX' lbs'}
I have included calculations for the conversions. However the height one is a bit rough - it will be OK for humans under 10 feet in height, but you will run into problems if measuring giraffes
Sample here: https://acrobat.com/#d=ZtMHjwuMyDhXOVzbBqzHSA
Good luck,
Niall
PS if you don't like the funny single quotation mark for feet you could go for a pattern like:
text{X'ft 'XX'in'}