sentences:  However, neighborhood boundaries can shift and most residents see the modern boundaries differently, as the Lenox Hill post office and the neighborhood's service-oriented retail shops are located east of Lexington Avenue.Many city maps also place Lenox Hill in the lower "east" section of the Upper East Side, including maps of Manhattan Community District 8 and by the Friends of the Upper East Side.The neighborhood is named for the hill that "stood at what became 70th Street and Park Avenue."