Actually, 6 May 1892 would have been the date she registered to leave her parish. It wouldn't have been the date of leaving Sweden. She would have needed time to travel to the port. Many who lived in southern Sweden (as she did) would have used a port in Denmark or Germany.
Svensdotter, Charlotta Unmarried woman
b. 2/10/1870 in Örkelljunga, Kristianstads län (Skåne)
Emigrated 5/6/1892 from Boalt, Örkelljunga, Kristianstads län (Skåne) to Amerika
Source: Household Examination Roll, p. 47
Emibas migration file ID: Örkelljunga L 1892 010
I don't see her on the Emihamn database so she apparently did not leave through a Swedish port.