I voted to close this as too-broad (it says off-topic because that's what the majority of votes were) because it's asking us how they could be a better salesman when we haven't got any form of demographic information on the customers, yes they're asking on behalf of the united-states but
- What kind of jewelry are they selling?
- What kind of age-group/class are the women going to the stall?
Say for example someone asked us, how they could sell drinks to someone because they're a bartender? Selling someone in a middle-class area cocktails is different to selling someone pints of ale in the local public house. We need more information, not only on the demographic, but it would help if they could give us examples of what they're currently trying or going to try and then we can give feedback on that.
A question is too broad if it elicits an array of answers. Which this question currently does. If it narrowed down to specifics, then I'm happy to vote to reopen.