To scroll it down to a certain point in the page, there are some suggestions here:
590402-scroll-move-webpage-location-upon-load
To scroll to the latitude or longitude point, you would have to write the link code slightly differently:
<a href="#" onClick="wagmp_map_1_obj.getPointByAddress('42.79275', 'latitude').marker.openInfoWindowHtml(wagmp_map_1_obj.getPointByAddress('42.79275', 'latitude').address.infowindowtext);" >Link to map</a>
If you wanted to reference the point by longitude, you could do the same thing, just change latitude to longitude and replace the 42.79275 with the -77.608817.