I feel like this has changed a lot over the years. My current road bike is 2" taller than my 10 year old hybrid. I have about an inch standover. I can stop comfortably but usually tip it for everything else.
If you really want the bike, go back and tell him it's fine and change the subject with other questions. Truthfully, I'd take my business elsewhere. I finally found an LBS that doesn't treat me like a silly girl--just keep looking.
"Well-behaved women seldom make history." --Laurel Thatcher Ulrich
'09 Trek WSD 2.1 with a Brooks B-68 saddle
'11 Trek WSD Madone 5.2 with Brooks B-17