Maps don't remember or store locations of events, so you'll have to do it manually with 2 choices.
1) The easier way is to install
this script and follow the instructions in the demo to memorize and restore each event's location.
2) The harder way is to use a Parallel Process event. First, when you leave the map (in the event that transfers you outside the house), store every event's location in different variables and turn on a switch (say ID#1). Something like:
@>Control Variables: [Event1 X] = [Event1]'s Map X
@>Control Variables: [Event1 Y] = [Event1]'s Map Y
@>Control Variables: [Event2 X] = [Event2]'s Map X
@>Control Variables: [Event2 Y] = [Event2]'s Map Y
etc.
@>Control Switches: [1: Moved Furniture] = ON
Now, create a Parallel Processing event as follows:
@>Set Event Location: [Event1], Variable[Event1 X][Event1 Y]
@>Set Event Location: [Event2], Variable[Event2 X][Event2 Y]
etc.
@>Erase Event
Check the Conditions switch box and select [Switch 1: Moved Furniture].
There, now you have two methods of creating movable furniture. Good luck!