She’s 5’7”.
In her 2008 run, her campaign staff reported her official height at 5’5”. Probably 5’3” by now.
https://www.washingtonpost.com/lifestyle/style/is-hillary-clinton-getting-taller-or-is-the-internet-getting-dumber/2015/09/24/58af4dfa-5e33-11e5-9757-e49273f05f65_story.html
I don’t know your source for that. HRC is not that tall. You can see that from photos, and she’s usually in 2” heels even then.