I copy the related information from the N-470 instructions for your information here:
Filing a Form N-470 does not relieve a permanent resident from obtaining a reentry permit, in advance of trips outside the United States for a year or more, nor does it relieve the applicant from the naturalization law's physical presence requirement.
An applicant qualifying for the residency preservation may extend the benefit to his or her spouse and dependent children who are all members of the same household and have lived with the principal applicant while abroad.