You can't control the priority that Google gives to listings (other than by using the filters, e.g. 'by date', that are available on the left of the screen). Google ranks websites largely upon the number of links provided to those sites elsewhere on the web, and by the volume of traffic received by each site.
If you want your particular dressmaker to be at the top of the list, you'll need to enter more information into Google such as (obviously!) the name of the dressmaker or part of their address.
If you knew that the dressmaker was referred to on a particular website you could limit your search to that specific website only. Here's an example of a Google search which examines only one website:
http://tinyurl.com/4vrf9ac
Chris