Why are my yucca leaves dying?
It's in front of a large window with morning sun and evening shade. It's usually about 70° in my apartment too.
Certified GKH Gardening Expert
The yellowing leaves and then eventual drying leaves may be watering issues in combination with lighting. Make sure the soil is of good quality and well draining. Allow the first inch or so to dry out before watering again.
Here is a link to refresh you on the care requirements.