My Problem
(https://i.imgur.com/U9CdOfw.png)
You could use the -n (--printConv) option (https://exiftool.org/exiftool_pod.html#n---printConv), specifically the hashtag version, to compare against the raw number.
exiftool -if "$AvgBitrate#>766000" -AvgBitrate /path/to/files/