Final answer:
The exact percentage of all dwellings with electricity in 1922 is not explicitly stated in the provided information, but historical context suggests a significant increase in household electrification during the 1920s.
Step-by-step explanation:
The question pertains to the historical adoption of electricity in dwellings in the United States around the year 1922. Based on historical data, the electrification of homes increased significantly during the 1920s due to the advent of corporations like Westinghouse and General Electric, as well as the booming consumer goods market stoked by the rising popularity of electrical appliances. By integrating historical context with available statistics, the closest approximation to what percentage of all dwellings had electricity in 1922 can be inferred.
However, the precise answer to what percentage of all dwellings had electricity in 1922 isn't provided in the details above, and would require further historical research to confirm. The supplied information emphasizes the growth of electrical appliances and the influx of electricity in homes, signaling a rise in household electrification during that period.