The relevance for 19000405 “Microsoft Office for Mac 2019 - PowerPoint 16.84.1 Available” is invalid.
exists application whose (name of it = "Microsoft PowerPoint.app") AND (it as string < "16.84.1) of string "CFBundleShortVersionString" of dictionary of file "/Applications/Microsoft PowerPoint.app/Contents/Info.plist"
lacks a closing quote in the version check. It should be
exists application whose (name of it = "Microsoft PowerPoint.app") AND (it as string < "16.84.1") of string "CFBundleShortVersionString" of dictionary of file "/Applications/Microsoft PowerPoint.app/Contents/Info.plist"