The Seneca Falls "Declaration of Sentiments" asserted that "Woman is man's equal." In what ways would that change the status women held at that time?
It did not change it at all.
The Seneca Falls meeting was the first for a group which came to be known as suffragettes. It was convened in 1848 and led by Lucretia Mott and Elizabeth Cady Stanton. Also in attendance was the abolitionist Frederick Douglas.
The declaration of equal rights for women was simply their stating the position and they never wavered from it.
The first inroads women made towards equality did not happen until the 1890s when they were first elected to office and some took on careers besides the two accepted careers, nursing and teaching.