Yup, without a valid MHR, the rest are simply numbers. All zones, and thresholds (as they relate to heart rate) are based on % of max. It's very possible that you spent 61% of your time over 85% of your MHR (your determination of redline given your numbers), but you'll never know until you validate your MHR.
As Danno has already stated, also find your LTHR (this is trainable, and therefore, a dynamic number), and then you can really have fun with your data. Good luck!