Image becomes blurry after exporting as JPEG from Illustrator

I have an image in illustrator that I am trying to save as a JPEG. The file will be uploaded so people can purchase and then print themselves for framing. JPEG is the most popular digital download, so I would like to keep this file type however PDF is a less than ideal option B. The file is crisp when I zoom in on illustrator, but becomes blurry when I save as JPEG. My saving settings are CMYK, high image quality, Baseline (standard) compression, higher (300DPI) resolution, and art-optimized (supersampling).

Any suggestions on how to fix this would be really appreciated. Let me know any additional information you need.